could be fungal, anyway...
This is my beloved Tahoma Glacier Sweet Sugar. It's been growing two new shoots. Today, I noticed there were brown water soaked area (rather large area like half an inch) on the lower part of developing leaves. (the part that will eventually become new pb).
I was pretty upset as I never had this kind of rot happening and I like this plant. then I started thinking where this rot came from and started to worry about my other plants.
I cut the area out with a blade (it was deeper than I thuoght) then put some cinnamon powder. not sure if I cut out deep enough. it looks really bad with all the baby leaves that were developing inside are all exposed and mostly cut away. maybe I should just give up on this growth and focus on the other growth. not sure what to do really.
There is another new growth on the other side of this mother pb. That one had stopped growing almost as soon as it formed, so maybe that one might start to grow instead now.
Whatever happens, I will try and save the plant as much as I can. Wish me luck!